Installation and Maintenance
What the exam expects
Installation questions test whether you can sequence work correctly and apply support, spacing, protection, and accessibility rules. Maintenance questions test planned versus corrective work, documentation, and the discipline of following manufacturer instructions over habit.
Core concepts to master
Support and securing intervals, protection from physical damage, working clearances and dedicated equipment space, accessibility of joints and equipment, expansion and vibration accommodation, torque values and connection integrity, and preventive maintenance intervals. Understand commissioning, baseline records, and how thermal imaging or vibration analysis fits a predictive program. Know that manufacturer instructions are part of the listing and must be followed.
Traps that appear in questions
Frequent traps include treating a splice inside a raceway as acceptable, assuming "accessible" means "easy to reach" rather than "reachable without damaging the structure," and ignoring that working clearance is measured from the equipment, not the wall. Another trap is maintenance deferral: questions may suggest skipping a scheduled inspection because the equipment has performed reliably. Reliability is not evidence of compliance. Also watch for scenarios where a replacement part is functionally equivalent but not listed for the equipment.
Rule of thumb
If the manufacturer's instructions and a long-standing field practice disagree, the instructions win.
Worked example
A technician replaces a failed contactor with a higher-rated unit from stock. The substitute fits and works, but it is not listed for that assembly, so the modification is not acceptable. The correct action is to install the specified component or obtain the manufacturer's written approval before returning the equipment to service. Record the replacement, the part number, and the date in the maintenance log.